There's a good chance if you own a home, Bank of America services your loan. It has 20 percent of the home loan market. But many of those loans are in trouble and that's causing serious problems for B of A. Last week, Warren Buffett rode to the rescue and bought 5 billion dollars worth of preferred stock. But maybe, in hindsight, that wasn't such a good thing. Here to explain is Jesse Eisinger. He's a senior reporter for the non profit news site, ProPublica.